24. I can hardly imagine Peter ________ across the Atlantic Ocean in five

　　 days.

　　　 A. sail　 　　　B. to sail　　　　 C. sailing　　　　 D. to have sailed

23. The secretary worked late into the night, _________ a long speech for

　　　 the president.

　　　 A. to prepare　　　 B. preparing

　　　 C. prepared　　　　 D. was preparing

22. When and where to build the new factory _________ yet.

　　 A. is not decided　　　　　　　 B. are not decided

　　 C. has not decided　　　　　　 D. have not decided

55. Three-fourths of the surface of the earth ____ sea. (88)

　　　 A. is　　　　 B. are　　　　 C. were　　　 　D. have been

the + adj.　 表示一类人　　 谓语动词是复数

the + adj.　 表示一组抽象概念

10. A library with five thousand books _________ to the nation as a gift.

　　　 A. is offered　　　　 B. has offered　　　　 C. are offered　　　　 D. have offered

14. No one but Rose and Kate ____ a fine red coat.

　　　 A. put on　　 B. is wearing　　 C. dresses　　 D. have on

8. The teacher, with 6 girls and 8 boys of her class, ____ visiting a

　　 museum when the earthquake struck.

　　 A. was　　　　 B. were　　　　 C. had been　　　　 D. would be

7、不定式、动名词、从句做主语

　　　　 谓语动词是单数

　　　　　　 To see is to believe.

　　　　　　 Seeing is believing.

　　　　　　 What I said is right.

6、百分比结构的主谓宾

　　　　 50% of the students　　 谓语动词复数

　　　　 of后面的名词决定谓语动词的单复数

PhD　　 Permanent head Damage

5、and

　　　　 A and B　　 一般是复数

　　　　　　 例外：A teacher and a lawyer

　　　　 法律法规(law and order)　 谓语动词是单数

　　　　 bread and butter

　　　　 to love and to be loved

　　　　 war and peace